On Fri, 18 Jun 2010 03:17:27 -0700 (PDT), "Man at B&Q"
wrote:

On Jun 17, 6:46*pm, Bodincus wrote:

And - by the way - since when is the voltage of a battery an indication
of the residual power in it?

http://www.farnell.com/datasheets/97133.pdf

NiCD and NiMH have a pretty flat discharge curve so the voltage
remains fairly stable until they are about 90% discharged.

Therefore voltage is a fairly good, if crude, way of estimating the
charge left it these types. The same is not true for alkalis.
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